Symmetricom TimeProvider 500, Руководство пользователя

Страница: 162 / 174

162 TimeProvider 500 2.0 User’s Guide 098-00172-000 Revision A – December, 2009
Version 1.0 Factory Defaults
2.048 MHz Outputs
Holdover
< 20 microseconds after 24 hours following loss of PTP reference.
Test Conditions:

TimeProvider 500 subjected to 5

C temperature variation throughout test.

TimeProvider 500 referenced to PTP for at least 24 hours prior to the start of holdover.

TimeProvider 500 powered > 5 days prior to the test.
Version 1.0 Factory Defaults
Table C-12 provides general and communication default values.
Table C-11. 2.048 MHz Specifications
Parameter Specification
Amplitude 1.0 to 1.9 volts peak, 1.5 volts peak nominal into 120

0.8 to 1.5 volts peak, 1.2 volts peak nominal into 75

Wave Shape Square Wave
Termination Impedance 75

Table C-12. General and Communication Parameters
Description Default Value Value Range
Acc-Grandmaster IP Address 0.0.0.0 Valid IPv4 Address
Alarm Delay 3 seconds { Alarm Alarm_Num | All } {Enable | Disable }
Alarm State Enabled Enable | Disable
Announce Interval 1 second 1, 2, 4, 8 second(s)
Bridge Time 180 seconds [0, 1, ..., 86400]
Domain 0 0-127
DSCP 0 0-63
EIA-232 Port 57.6k-8-N-1 Fixed
Firewall Allowed for
telnet / ICMP Allowed | Blocked
Freerun Output ON { ais | on | squelch }